CHEMISTRY MIDDLE SCHOOL

A mole or fraction of a mole represents a ____ number of atoms or molecules.A : specific

B : nonspecific

Answers

Answer 1
Answer:

Answer:

specific

Explanation:

a mole represents the amount of grams it takes to have avogadro's number
Answer 2
Answer:

Answer:

A is your answer

Explanation:

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Answers

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Which element is likely to have the highest thermal conductivity

Answers

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Which has a greater speed,a heron that travels 600m in 60 seconds or a duck that travels 60m in 5 seconds? explain

Answers

In order to find out the answer to this problem, you need to know how to find the unit rate. A unit rate a rate that has a denominator of 1. You find the unit rate because the problem is asking you to find the faster speed, but the ratios are different.
So 600m in 60 sec you divide both by 60. It comes out as 10m in 1 sec for the heron.
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Compare the heron to duck. The heron travels faster.
Give 5 stars if it helped!! :)

What happens to the molecules in a gas when it condenses?

Answers

when gas molecules condence they become a liquid and if the liquid molecules condence they turn into a solid but the solid molecules cannot condence

How does the stationary front differ from both the warm and cold front

Answers

A stationary front doesn't move at all, where warm and cold fronts do.

How many liters of O2 gas will be produced at STP from 4 moles of KC1O3

Answers

Answer:

V = 134.5 L

Explanation:

Given data:

Number of moles of KClO₃ = 4 mol

Litters of oxygen produced at STP = ?

Solution:

Chemical equation:

2KClO₃  →  2KCl   + 3O₂

Now we will compare the moles of KClO₃ with oxygen.

                    KClO₃        :           O₂

                        2            :           3

                        4            ;          3/2×4 = 6 mol

Litters of oxygen at STP:

PV = nRT

V = nRT/P

V = 6 mol × 0.0821 atm.L/mol.K × 273 K / 1atm

V = 134.5 L / 1

V = 134.5 L
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